Cia peb txuas ntxiv mus qhia txhua txoj kev ntawm Hlau Txhaj Moulding tshuab.
Niaj hnub no peb yuav tham txog sintering uas yog cov ntsiab lus tseem ceeb tshaj plaws thaum lub sij hawm MIM.
LUB SIJ HAWM NTAWM SINTERING
1) Sintering yog kom sov thiab hnov cov hmoov compact ntawm qhov kub qis tshaj qhov melting point ntawm nws lub ntsiab Cheebtsam, thiab ces txias nws nyob rau hauv ib tug tej yam txoj kev thiab ceev, yog li txhim kho lub streth thiab ntau yam ntawm lub cev thiab txhua yam khoom ntawm lub compact thiab tau txais. ib co metallographic qauv.
2) Cov txheej txheem yooj yim yog Powder compact-Furnace Charging-Sintering nrog rau Preheating, Kub Preservation thiab Cooling-Firing-Sintered khoom.
3) Kev ua haujlwm ntawm sintering yog tau txais cov roj nplua nyeem tshem tawm, metallurgical bonding, lub ntsiab diffusion, seem hloov, microstructure thiab ocidation tiv thaiv.
LUB SIJ HAWM QHIA TXOG SINTERING PROCESS
1) Tsawg kub Pre-sintering theem:
Nyob rau hauv lub sij hawm no, lub rov qab ntawm cov hlau, volatilization ntawm adsorbed roj thiab noo noo, decomposition thiab tshem tawm ntawm kev tsim tus neeg sawv cev nyob rau hauv lub compact.
2) Nruab nrab kub cua sov sintering theem:
Recrystallization pib nyob rau theem no.Ua ntej, cov khoom siv lead ua deformed tau rov qab los hauv cov khoom thiab rov ua dua tshiab rau hauv cov khoom siv lead ua tshiab.Nyob rau tib lub sijhawm, cov oxides nyob rau saum npoo ntawm cov khoom raug txo kom tiav, thiab cov khoom sib txuas ua rau lub caj dab sintering.
3) High termperature hnov preservation kom tiav sintering theem:
Cov theem no yog cov txheej txheem tseem ceeb ntawm sintering, xws li diffusion thiab ntws tag nrho cov txheej txheem thiab ze kom tiav, tsim ib tug loj tus naj npawb ntawm cov pores kaw, thiab txuas ntxiv mus rau shrink, thiaj li hais tias tus pre-loj thiab tag nrho cov pores raug txo, thiab qhov ceev. ntawm sintered lub cev yog ho nce.
4) Txias theem:
Qhov tseeb sintering txheej txheem yog tas li sintering, yog li cov txheej txheem los ntawm sintering kub kom qeeb txias rau ib lub sij hawm ntawm lub sij hawm thiab ces ceev ceev txias kom txog rau thaum lub cub tawg tso zis mus txog rau chav tsev kub kuj yog ib tug theem uas austenite decomposes thiab lub kawg qauv yog maj mam tsim.
Muaj ntau yam cuam tshuam los cuam tshuam cov txheej txheem sintering.Thiab cov yam tseem ceeb xws li kub, lub sij hawm, cua, cov khoom muaj pes tsawg leeg, txoj kev alloy, lubricant cov ntsiab lus thiab sintering txheej txheem xws li cua sov thiab txias npaum li cas.Nws tuaj yeem pom tias txhua qhov txuas muaj qhov cuam tshuam tseem ceeb ntawm qhov zoo ntawm sintering.Rau cov khoom uas muaj cov qauv sib txawv thiab cov hmoov sib txawv, cov khoom sib txawv yuav tsum tau hloov kho.
Post lub sij hawm: Jan-15-2021